Two different tribes of Mordvinians, Erzia and Moksha, were studied wi
th respect to 13 different genetic marker systems. The Erzia and Moksh
a were shown to be fairly homogeneous; a significant gene frequency di
fference was found only in the MN blood group system. Estimation of th
e genetic distances revealed that Mordvinians showed the closest relat
ionship to the Maris and to populations of the western Finno-Ugrian li
nguistic group such as Finns, Estonians and Karelians.